QF 4-inch naval gun Mk V
| Ordnance QF 4 inch gun Mk V | |
|---|---|
QF 4 inch HA guns aboard the cruiser HMAS Sydney, 1939–1940 | |
| Type | Naval gun Anti-aircraft gun Coastal defence gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1914–1945 |
| Used by | British Empire |
| Wars | World War I World War II |
| Production history | |
| No. built | 944 |
| Specifications | |
| Mass | Barrel & breech: 4,890 lb (2,220 kg) |
| Barrel length | Bore: 15 ft (4.6 m) (45 cal) Total: 15 ft 8 in (4.8 m) |
| Shell | 31 lb (14.1 kg) fixed QF or Separate-loading QF |
| Calibre | 4-inch (101.6 mm) |
| Breech | horizontal sliding-block |
| Recoil | hydro-pneumatic or hydro-spring 15 inches (380 mm) |
| Elevation | mounting dependent |
| Traverse | mounting dependent |
| Muzzle velocity | 2,350 ft/s (716 m/s) |
| Maximum firing range | Surface: 16,300 yd (15,000 m) AA: 28,750 ft (8,800 m) |
| Filling | Lyddite, Amatol |
| Filling weight | 5 pounds (2.27 kg) |
The QF 4 inch Mk V gun was a Royal Navy gun of World War I which was adapted on HA (i.e. high-angle) mountings to the heavy anti-aircraft role both at sea and on land, and was also used as a coast defence gun.